*{
    margin:0;
    padding:0;
}
*,*:after,*:before{
    -webkit-box-sizing:border-box;
    box-sizing: border-box;
}
li{
    list-style:none;
}
a {
    margin: 0;
    padding: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
    text-decoration: none;
    outline: none;
    color: #818180;
}
body {
    font-family: "Helvetica Neue", Helvetica, STHeiTi, sans-serif; /*使用无衬线字体*/
    -webkit-text-size-adjust: 100%!important; /*禁止IOS调整字体大小*/
}

a, img {
    -webkit-touch-callout: none; /*禁止长按链接与图片弹出菜单*/}

html, body {
    -webkit-user-select: none; /*禁止选中文本*/
    user-select: none;
}
em,i{
    font-style: normal;
}
button,input,optgroup,select,textarea {
    -webkit-appearance:none; /*去掉webkit默认的表单样式*/}

a,button,input,optgroup,select,textarea {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    /*去掉a、input和button点击时的蓝色外边框和灰色半透明背景*/
    -webkit-appearance: none;
    /*去掉webkit默认的表单样式*/
    appearance: none;
    outline: none;
    border-radius: 0;
    border:none;
}
input::-webkit-input-placeholder {
    color:#ccc; /*修改webkit中input的planceholder样式*/}

input:focus::-webkit-input-placeholder {
    color:#f00; /*修改webkit中focus状态下input的planceholder样式*/}
input::-webkit-input-speech-button {
    display: none; /*隐藏Android的语音输入按钮*/}

fieldset,
img {
    border: 0;
    vertical-align: middle;
}